Panasonic KX-NS1000 Installation Manual page 334

8.4.2 One-look Networking Survivability
Isolated site
A site that will be disconnected from other sites during a fault.
Slave site
A Slave site where the Isolated setting is disabled.
Backup Master Mode
In this mode, you specify a Backup master site. When a fault occurs to a Master site in a One-look network,
the Backup master site will act as Master site temporarily after the whole system resets. Communication
services will then be provided from the Backup master site.
Notice
Only one Backup master site can exist in a One-look network.
Master Unit
Slave Unit
One-look Network
Notice
All Slave units will restart. Depending on the makeup of the network, it may take 15 minutes or more for
the system to become fully operational in Backup Master mode.
LED Indication
Operating
Status
Normal Green ON
After a Fault
at the Master
Site
For more information about LED indications, refer to "LED Indications" in "4.3.1 Mother Board".
Similarly, when you press the System Alarm button set for the flexible button on the PT, a message that
indicates the PBX status has changed will be displayed on the LCD on the PT.
334 Installation Manual
ITSP
Slave Unit
(Backup
Master Unit)
Slave Unit
Master Unit
STATUS MASTER
LED LED
Green ON
- -
Master Unit
Fault
Slave Unit
Slave Unit
(Backup Master Unit)
STATUS MASTER
LED LED
Green ON Amber ON
Green ON Green
Flashing
ITSP
Slave Unit
(Backup
Master Unit)
Slave Unit
One-look Network
Slave Unit
STATUS
LED
Green ON Amber ON
Green ON Amber ON
MASTER
LED